Abstract

On a high-pressure, high-mass flow, centrifugal compressor blade vibration measurements are carried out to determine the excitation mechanism in various operating ranges. For these experiments semiconductor strain gages were used. For the transmission of the signals, an 8 channel telemetry system has been installed. A research program was started with blade vibration measurements in different operating ranges of the compressor such as rotating stall, surge and flutter ranges and for the case of nonuniform flow conditions. The results of vibration tests with the impeller at rest showed the stress distribution and the strain directions during blade vibration. This information was used for the choice of the strain gage position on the blade. The experimental results were confirmed by a finite-element calculation considering a segment of the impeller with one blade, which determined the different vibration modes. Further, the steady strain distribution of the impeller due to centrifugal force and temperature was calculated. The investigations were completed by optical measurements to find out the vibration modes of the different blades in rotating operation. These tests were carried out by means of a holographic interferometric system with an optical derotator. The results show the various vibration modes of the blade up to a rotational speed of the compressor of 13,000 rpm.

Return to: Investigation of Blade Vibration of Radial Impellers by Means of Telemetry and Holographic Interferometry

Copyright in the material you requested is held by the American Society of Mechanical Engineers (unless otherwise noted). This email ability is provided as a courtesy, and by using it you agree that you are requesting the material solely for personal, non-commercial use, and that it is subject to the American Society of Mechanical Engineers' Terms of Use. The information provided in order to email this topic will not be used to send unsolicited email, nor will it be furnished to third parties. Please refer to the American Society of Mechanical Engineers' Privacy Policy for further information.

Shibboleth is an access management service that provides single sign-on protected resources.
It replaces the multiple user names and passwords necessary to access subscription-based content with a single user name and password that can be entered once per session.
It operates independently of a user's location or IP address.
If your institution uses Shibboleth authentication, please contact your site administrator to receive your user name and password.